Replacing a line inside file

[NuMan]

I've been searching over and over and i can't seem to find the function to do it.

What i want to do is replace a specific line inside a txt file for example:

 

line1
line2
line3

 

change line2 in that file to another line that i'd want. Any help will be greatly appreciated 

 

[kenrbnsn]

Read the file into an array using the file() function

Replace the line in the array

Write the file back out using a combination of the put_file_contents() and implode() functions.

 

Ken

[The Little Guy]

This might work, but I have not tested it, so give it a try:

 

// get contents of a file into a string
$filename = "/usr/local/something.txt";
$handle = fopen($filename, "w+");
$contents = fread($handle, filesize($filename));

$cArray = explode("\n",$contents);

$line = 2 - 1;

$cArray[$line] = "New Line Text";

$newFile = implode("\n",$cArray);

$fwrite($handle, $newFile);

fclose($handle);

[NuMan]

This might work, but I have not tested it, so give it a try:

 

// get contents of a file into a string
$filename = "/usr/local/something.txt";
$handle = fopen($filename, "w+");
$contents = fread($handle, filesize($filename));

$cArray = explode("\n",$contents);

$line = 2 - 1;

$cArray[$line] = "New Line Text";

$newFile = implode("\n",$cArray);

$fwrite($handle, $newFile);

fclose($handle);

 

Tried this to test:

<?
$filename = "text.txt";
$handle = fopen($filename, "w+");
$contents = fread($handle, filesize($filename));

$cArray = explode("\n",$contents);

$line = 2;

$cArray[$line] = "New Line Text";

$newFile = implode("\n",$cArray);

$fwrite($handle, $newFile);

fclose($handle);?>

 

Didn't work my text.txt is only this:

line1
line2
line3

[DarkWater]

Try:

 

<?php
$file = file_get_contents('test.txt');
$file = str_replace("line2\n", "New line!\n", $file);
file_put_contents('test.txt', $file);
?>

[NuMan]

Try:

 

<?php
$file = file_get_contents('test.txt');
$file = str_replace("line2\n", "New line!\n", $file);
file_put_contents('test.txt', $file);
?>

 

That doesn't work either it didn't change anything :|

[kenrbnsn]

What type of OS are your running? Linux or Windows? If you're running Windows you need to use "\r\n" instead of "\n" for the line terminator.

 

Ken

[NuMan]

What type of OS are your running? Linux or Windows? If you're running Windows you need to use "\r\n" instead of "\n" for the line terminator.

 

Ken

 

I am running windows o.o; let me try that EDIT: worked fine thanks problem solved!

[The Little Guy]

Who's method did you use?

[NuMan]

Who's method did you use?

 

DarkWater's im trying yours with \r\

 

Edit: tried yours and it emptyed out the file, then showed this

 

Warning: fread() [function.fread]: Length parameter must be greater than 0 in C:\wamp\www\test.php on line 5

 

Fatal error: Function name must be a string in C:\wamp\www\test.php on line 15

[NuMan]

sorry to bump, but those anyone knows how to replace a string withing a string? like the fallowing:

 

$line1
$line2 = 'string'
$line3

 

I want to replace 'string' inside of line no matter what it was too OR just replace the whole line with a new one.. Help please

[The Little Guy]

Try this:

 

$filename = "/usr/local/something.txt";
$handle = fopen($filename, "w+");
$contents = fread($handle, filesize($filename));

$findSTR = 'string';
$replaceSTR = 'new string';

preg_replace("~$findSTR~", $replaceSTR, $contents);

fwrite($handle, $contents);
fclose($handle);

[NuMan]

Try this:

 

$filename = "/usr/local/something.txt";
$handle = fopen($filename, "w+");
$contents = fread($handle, filesize($filename));

$findSTR = 'string';
$replaceSTR = 'new string';

preg_replace("~$findSTR~", $replaceSTR, $contents);

fwrite($handle, $contents);
fclose($handle);

 

But that only replaces the text string :/ i want to replace the whole line. Or the text between the " "

[NuMan]

bump.... any help?

[NuMan]

Hi, i am rebumping this old topic because i still need help with this

 

want a code that will edit a specified line in a php file no matter what the info in it is.

 

For example lets say my file has the following info:

<?php
$var1 = something1;
$var2 = something2;
$var3 = something3;
?>

 

I want to be able to edit line 2 ($var2 = something2;) to something else from POST, not mattering what line 2 contents.

 

Thanks in advanced.!

[kenrbnsn]

This is much easier:

<?php
$data = file('input_file.txt');
$data[1] = $_POST['data'] . "\n"; // entry 1 is the 2nd line
file_put_contents('input_file.txt',$data);
?>

 

Ken

[NuMan]

This is much easier:

<?php
$data = file('input_file.txt');
$data[1] = $_POST['data'] . "\n"; // entry 1 is the 2nd line
file_put_contents('input_file.txt',$data);
?>

 

Ken

 

Thank you that did work. One more thing though. I tried this:

<?php
$data = file('variables.php');
$data[1] = "$name = ".$_POST['info'] ." "\r\n"; // entry 1 is the 2nd line
file_put_contents('variables.php',$data);
?>

 

And i get this error :

Parse error: syntax error, unexpected T_ENCAPSED_AND_WHITESPACE, expecting T_STRING or T_VARIABLE or T_NUM_STRING  on line 3

What i am trying to do its get it to write:

$var = "$_POST['info']";

 

Thanks again.

[premiso]

<?php
$data = file('variables.php');
$data[1] = "$name = ".$_POST['info'] ." \r\n"; // entry 1 is the 2nd line
file_put_contents('variables.php',$data);
?>

 

That should work.

[NuMan]

<?php
$data = file('variables.php');
$data[1] = "$name = ".$_POST['info'] ." \r\n"; // entry 1 is the 2nd line
file_put_contents('variables.php',$data);
?>

 

That should work.

 

Hi, I tried that and this is what it writes:

<?php
= (info from $_POST['info'])
?>

 

What it should write is:

<?php
$name = "(info from $_POST['info'])";
?>

EDIT: I got it to type:

 = "(info from $post)"

by changing to:

$data[1] = "$name = \"".$_POST['info'] ."\" \r\n";

 

But i still can't get $name = to show.

[premiso]

<?php
$data = file('variables.php');
$data[1] = '$name = '.$_POST['info'] ." \r\n"; // entry 1 is the 2nd line
file_put_contents('variables.php',$data);
?>

[NuMan]

<?php
$data = file('variables.php');
$data[1] = '$name = '.$_POST['info'] ." \r\n"; // entry 1 is the 2nd line
file_put_contents('variables.php',$data);
?>

 

Thanks a lot, that solved my problem